Although they supported the presidential candidacy of Alessandri, eventually became opponents. In 1937, they joined the Popular Front and supported the candidacy of Pedro Aguirre Cerda. In 1941, they merged with the Democrat Party.

In the 1940s again were divided in the Democratic Party of Chile and the People's Democratic Party. Both parties were reunited in 1956. The party was dissolved in 1960, when meeting with other organizations to form the National Democratic Party (PADENA).